الفهرس 
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Abstract
Aim of the work
Dimension E.S. has 10 open channels; the aim of this study is to evaluate four parameters: urea, glucose, S.G.O.T. and C.K. by comparing its reagents with human reagents (Human Gesell Schaft für biochemical and diagnostic mbH. Silberachstrabe 9.D. 65232 taunusstein Germany).
Conclusion
As regards precision and accuracy, there was no significant statistical difference between normal dimension control sera and normal human control sera and also between pathological dimension control sera with pathological human control sera using both dimension and human reagents in all tested parameters. Also, no significant statistical difference in comparing both dimension and human reagents using normal and pathological patient’s sera.
As regards linearity, it was present in normal and pathological patient’s samples by using dimension and human and human reagents through the testes ranges:
Urea: 15-320 mg/dL.
Glucose: 70-500 mg/dL.
S.G.O.T.: 17-1000 IU/L.
C.K.: 250-800 IU/L.
As regards sensitivity by using distilled water, the least detectable limits of dimension reagents, were low out of range while the least detectable limits of human reagents were:
Urea: 1.038
Glucose: 2.145.
S.G.O.T.: 0%
C.K.: 2.079
As regards stability, there was a significant difference between stability of the reagents. Dimension reagents are stable for four months. Human reagents for glucose and urea were stable for four months while those for S.G.O.T. and CK are stable for 30 days and 15 days respectively.
As regards specificity, there was no significant difference in results of glucose estimation between haemolysed and non haemolysed samples using human reagents.
As regards medical requirements, there was no significant difference between random errors and systematic errors of all tested parameters with allowable limits of most investigators at both normal and pathological control sera of both dimension and human reagents. Also, total errors (S.E. +R.E.) of tested parameters using both dimension and human reagents were not exceeding allowable limits.
As regards cost/ test reagents were cheaper than dimension reagents.
From this study, it can be conclude that:
Dimension and human reagents proved statistically to be precise, accurate meet the medical needs.